Malicious PDF — malware analysis report

Static analysis result for SHA-256 a003d48366dbc333…

MALICIOUS

PDF

70.1 KB Created: 2021-02-20 22:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 64211e9829b69e30c85af3ceac3c492d SHA-1: eca68ff333e3fc78f403c9187b5a863941275a41 SHA-256: a003d48366dbc3338059ed371fb70e80298fc292f294256e8b7e386bcbf6c551
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=sony+remote+commander+manual In PDF document text
    • http://verenica.net/how_to_start_an_argumentative_essay_conclusionsxjlz.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/rilerizezon-guponim-lurinari.pdfIn PDF document text
    • http://gatorama.site/biochemistry_a_short_course45t2u.pdfIn PDF document text
    • http://komarovskii.xyz/toligarafiruxelog29o9f.pdfIn PDF document text
    • http://f13x.xyz/pukodewogukinevojawu9vr51.pdfIn PDF document text
    • http://mabay.fun/62113639657gsuez.pdfIn PDF document text
    • http://idealslimitalia-official.site/films_based_on_the_divine_comedy969hg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajarajizuwoso.rf.gd/lg_wm3001hwa_not_draining.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/gubesokisonevari.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/cassandra_client_for_windows.pdfIn PDF document text
    • http://zagizub.rf.gd/google_ads_search_certification_answers_november_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/address_format_usa_to_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/ielts_writing_task_1_academic_with_answers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 5112 bytes
SHA-256: 6ecf5bb36a3bf05faab40f5d3562809e2644566c79eec5570a0fbf35f693469b
font_01_sfnt_off0000e71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71E 10252 bytes
SHA-256: d04b7170341da3e7e7eeb44900d7ade4f68330ab94045c0bfbf65bce1e9e4b48